IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (C最新文献
A stub switched phase shifter, which consists of a reference line, a delay stub and fewer RF switches than the switched line phase shifter, is proposed. It has low phase deviation characteristics. Especially, for the condition of /spl Phi/=180/spl deg/, S=0, L=1/2/spl lambda/g/sub 0/, the proposed phase shifter can reduce two RF switches, and is as compact as about 40% the size of a conventional switched-line phase shifter. It is suitable for phased array applications. The characteristics of the proposed phase shifter designed for /spl Phi/=90/spl deg/, 180/spl deg/ were confirmed by the method of moments.
{"title":"Stub switched phase shifter","authors":"K. Nakada, T. Marumoto, R. Iwata","doi":"10.1109/APS.2000.875337","DOIUrl":"https://doi.org/10.1109/APS.2000.875337","url":null,"abstract":"A stub switched phase shifter, which consists of a reference line, a delay stub and fewer RF switches than the switched line phase shifter, is proposed. It has low phase deviation characteristics. Especially, for the condition of /spl Phi/=180/spl deg/, S=0, L=1/2/spl lambda/g/sub 0/, the proposed phase shifter can reduce two RF switches, and is as compact as about 40% the size of a conventional switched-line phase shifter. It is suitable for phased array applications. The characteristics of the proposed phase shifter designed for /spl Phi/=90/spl deg/, 180/spl deg/ were confirmed by the method of moments.","PeriodicalId":324296,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (C","volume":"208 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117085769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A new technique for inverting the radially dependent permittivity profile in spherical dielectric objects illuminated by TE- or TM-polarized waves is presented. The technique is based on a generalization of the well established Fourier transform method used for reconstructing permittivity profiles in planar stratified media in conjunction with a previously proposed renormalization technique to obtain a unique solution of the involved nonlinear problem. The unknown permittivity profile is reconstructed in terms of a spherical Fourier-Bessel transform of the measured reflection coefficient data in conjunction with a numerical transform. A number of reconstruction examples has been considered and an excellent agreement between original and reconstructed profiles has been achieved even for very high values of permittivity.
{"title":"Profile inversion of spherical objects illuminated by TE- and TM-polarized waves","authors":"M. Akhtar, A. Omar","doi":"10.1109/APS.2000.874585","DOIUrl":"https://doi.org/10.1109/APS.2000.874585","url":null,"abstract":"A new technique for inverting the radially dependent permittivity profile in spherical dielectric objects illuminated by TE- or TM-polarized waves is presented. The technique is based on a generalization of the well established Fourier transform method used for reconstructing permittivity profiles in planar stratified media in conjunction with a previously proposed renormalization technique to obtain a unique solution of the involved nonlinear problem. The unknown permittivity profile is reconstructed in terms of a spherical Fourier-Bessel transform of the measured reflection coefficient data in conjunction with a numerical transform. A number of reconstruction examples has been considered and an excellent agreement between original and reconstructed profiles has been achieved even for very high values of permittivity.","PeriodicalId":324296,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (C","volume":"255 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115281725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This work is devoted to the fundamental question of the relationship between local, external and averaged electrostatic field in nonpolar anisotropic dielectrics. Artificial dielectrics are under consideration. This makes possible to be restricted to classical electrostatics without additional approximations. We offer an approach that is an alternative to the classic deduction of the Lorenz-Lorentz formula. This makes it possible to take into account the interaction between inclusions in the artificial dielectrics with complex inner geometry and dielectric permittivity. Numerical calculation for oblique-angled lattices was carried out.
{"title":"On the relations of microscopic and averaged material parameters in composite media","authors":"P. Belov, C. Simovski, M. S. Kondratjev","doi":"10.1109/APS.2000.873837","DOIUrl":"https://doi.org/10.1109/APS.2000.873837","url":null,"abstract":"This work is devoted to the fundamental question of the relationship between local, external and averaged electrostatic field in nonpolar anisotropic dielectrics. Artificial dielectrics are under consideration. This makes possible to be restricted to classical electrostatics without additional approximations. We offer an approach that is an alternative to the classic deduction of the Lorenz-Lorentz formula. This makes it possible to take into account the interaction between inclusions in the artificial dielectrics with complex inner geometry and dielectric permittivity. Numerical calculation for oblique-angled lattices was carried out.","PeriodicalId":324296,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (C","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115692891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Axisymmetrical structures play an important role in high frequency research and engineering. Examples of application include horn and rod antennas, circular waveguide discontinuities, resonators, and particle accelerators. Two FDTD formulations for axisymmetrical problems have been proposed by Gwarek, Morawski and Mroczkowski (1993) and by Jurgens and Saewert (1995). Both operate on a 2D mesh, and account analytically for azimuthal sin(m/spl phi/)/cos(m/spl phi/) field dependence. The two approaches lead to different field update equations and in practice-to somewhat different results. Both algorithms require special treatment of on-axis components, which may cause instabilities or, as we show in this paper, ambiguous solutions. We propose an FDTD formulation for axisymmetrical problems, based on a new mesh construction scheme and a new set of system variables, which: eliminates the need for special on-axis equations; remains stable, and consistent for different axis locations on the mesh; and requires less computer operations per time step than the scheme of Jurgens. We also show that the differences between the two methods are due to different assumptions regarding local field behaviour in cylindrical coordinates, and that the choice of a better approximation is determined by circuit technology.
{"title":"Improved and simpler FDTD formulation for axisymmetrical problems","authors":"M. Celuch-Marcysiak, W. Gwarek","doi":"10.1109/APS.2000.873750","DOIUrl":"https://doi.org/10.1109/APS.2000.873750","url":null,"abstract":"Axisymmetrical structures play an important role in high frequency research and engineering. Examples of application include horn and rod antennas, circular waveguide discontinuities, resonators, and particle accelerators. Two FDTD formulations for axisymmetrical problems have been proposed by Gwarek, Morawski and Mroczkowski (1993) and by Jurgens and Saewert (1995). Both operate on a 2D mesh, and account analytically for azimuthal sin(m/spl phi/)/cos(m/spl phi/) field dependence. The two approaches lead to different field update equations and in practice-to somewhat different results. Both algorithms require special treatment of on-axis components, which may cause instabilities or, as we show in this paper, ambiguous solutions. We propose an FDTD formulation for axisymmetrical problems, based on a new mesh construction scheme and a new set of system variables, which: eliminates the need for special on-axis equations; remains stable, and consistent for different axis locations on the mesh; and requires less computer operations per time step than the scheme of Jurgens. We also show that the differences between the two methods are due to different assumptions regarding local field behaviour in cylindrical coordinates, and that the choice of a better approximation is determined by circuit technology.","PeriodicalId":324296,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (C","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117180573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The digital terrestrial broadcasting station will use multiple channels in common. Therefore, the required properties of the transmitting station will be broad bandwidth and high gain. The authors have previously (see IEEE AP-S Int. Symposium, p.1570-3, July 1999) investigated the 2-element modified batwing antenna with the reflector (2MBWAR) for UHF used in digital terrestrial broadcasting. It was calculated with the balanced feed shape. As a result, the broadband input impedance of 100 /spl Omega/ was obtained. However, in practical use, this antenna requires the balun and the impedance transformer as another circuit. So it has the complex feed system and high cost. In this paper, we propose the unbalance fed modified batwing antenna (UFMBA) which does not use a balun and an impedance matching circuit. The same broad bandwidth and high gain compared with the previous feed shape are obtained. Next, the parallel coupling UFMBA to obtain high gain is investigated. The gain of about 14 dBi is obtained for coupling four elements.
数字地面广播电台将共用多个频道。因此，对发射台的性能要求是宽带和高增益。作者之前已经(见IEEE AP-S Int)。论文(Symposium)， p.1570-3, July 1999)研究了用于UHF数字地面广播的带有反射器的2元改进蝙蝠翼天线(2MBWAR)。采用平衡进料形状进行计算。得到了100 /spl ω /的宽带输入阻抗。然而，在实际使用中，这种天线需要平衡和阻抗变压器作为另一个电路。因此它的进料系统复杂，成本高。本文提出了一种不使用平衡馈电和阻抗匹配电路的不平衡馈电改进蝙蝠翼天线。与以前的馈电形状相比，获得了相同的宽带宽和高增益。其次，研究了并联耦合UFMBA获得高增益的方法。通过四元耦合，获得了约14 dBi的增益。
{"title":"Characteristics of digital terrestrial broadcasting antennas. (2) unbalance fed modified batwing antenna","authors":"Y. Ojiro, H. Kawakami","doi":"10.1109/APS.2000.875269","DOIUrl":"https://doi.org/10.1109/APS.2000.875269","url":null,"abstract":"The digital terrestrial broadcasting station will use multiple channels in common. Therefore, the required properties of the transmitting station will be broad bandwidth and high gain. The authors have previously (see IEEE AP-S Int. Symposium, p.1570-3, July 1999) investigated the 2-element modified batwing antenna with the reflector (2MBWAR) for UHF used in digital terrestrial broadcasting. It was calculated with the balanced feed shape. As a result, the broadband input impedance of 100 /spl Omega/ was obtained. However, in practical use, this antenna requires the balun and the impedance transformer as another circuit. So it has the complex feed system and high cost. In this paper, we propose the unbalance fed modified batwing antenna (UFMBA) which does not use a balun and an impedance matching circuit. The same broad bandwidth and high gain compared with the previous feed shape are obtained. Next, the parallel coupling UFMBA to obtain high gain is investigated. The gain of about 14 dBi is obtained for coupling four elements.","PeriodicalId":324296,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (C","volume":"25 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120924137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Because of severe fading caused by the movement of the portable terminal, it is insufficient to only test a handset under an environment of multiple waves, as in mobile communication, especially in a city or to only evaluate the static characteristics in an anechoic chamber. The random field method which actually measures the handsets in the open site is time consuming, has a poor measurement repeatability, and also the problem of obtaining a radio license. The field simulator, i.e. a portable handset evaluation system reproducing the artificial fading environment inside the building solves these problems. This paper presents a prototype field simulator applied to the connection rate test in a weak electric field environment, and to diversity characteristic evaluation in development of an antenna.
{"title":"A handset terminal evaluation system by field simulator","authors":"H. Arai, N. Ohnishi, H. Saito, K. Sasaki","doi":"10.1109/APS.2000.874946","DOIUrl":"https://doi.org/10.1109/APS.2000.874946","url":null,"abstract":"Because of severe fading caused by the movement of the portable terminal, it is insufficient to only test a handset under an environment of multiple waves, as in mobile communication, especially in a city or to only evaluate the static characteristics in an anechoic chamber. The random field method which actually measures the handsets in the open site is time consuming, has a poor measurement repeatability, and also the problem of obtaining a radio license. The field simulator, i.e. a portable handset evaluation system reproducing the artificial fading environment inside the building solves these problems. This paper presents a prototype field simulator applied to the connection rate test in a weak electric field environment, and to diversity characteristic evaluation in development of an antenna.","PeriodicalId":324296,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (C","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127108205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The segmentation technique has been widely used for the full-wave analysis of microwave circuits to reduce CPU time and memory requirements. When this technique is implemented by linking multimode and multiport matrices of the different regions in which the circuit is divided, these matrices must be obtained for a great number of frequencies if a broad band analysis is required. In this paper, it is the SFELP method (segmentation/finite elements/Lanczos-Pade) is introduced. This method applies the symmetric Pade via Lanczos algorithm (SyMPVL) to a 3D-finite elements/segmentation method (3D-FE/SM) for obtaining a reduced order model of the transfer function of each region in which a 3D analysis is used. The result for each region is the multimode multiport generalized admittance matrix (GAM) on a wide band of frequencies from which the generalized scattering matrix (GSM) is computed. Then, the global response of the circuit can be immediately obtained by connecting the partial GSMs.
分割技术已广泛应用于微波电路的全波分析，以减少CPU时间和内存需求。当该技术通过连接电路划分的不同区域的多模和多端口矩阵来实现时，如果需要进行宽带分析，则必须获得大量频率的这些矩阵。本文主要介绍了SFELP法(分割法/有限元法/ lanczos - page法)。该方法通过Lanczos算法(SyMPVL)将对称的page应用于三维有限元/分割法(3D- fe /SM)，以获得使用三维分析的每个区域传递函数的降阶模型。每个区域的结果是宽频带上的多模多端口广义导纳矩阵(GAM)，由此计算广义散射矩阵(GSM)。然后，通过连接部分gsm，可以立即得到电路的全局响应。
{"title":"SFELP: a hybrid 3D-finite elements/segmentation method with fast frequency sweep based on the SyMPVL algorithm for the analysis of passive microwaves circuits","authors":"J. Rubio, J. Garcia, J. Zapata","doi":"10.1109/APS.2000.875435","DOIUrl":"https://doi.org/10.1109/APS.2000.875435","url":null,"abstract":"The segmentation technique has been widely used for the full-wave analysis of microwave circuits to reduce CPU time and memory requirements. When this technique is implemented by linking multimode and multiport matrices of the different regions in which the circuit is divided, these matrices must be obtained for a great number of frequencies if a broad band analysis is required. In this paper, it is the SFELP method (segmentation/finite elements/Lanczos-Pade) is introduced. This method applies the symmetric Pade via Lanczos algorithm (SyMPVL) to a 3D-finite elements/segmentation method (3D-FE/SM) for obtaining a reduced order model of the transfer function of each region in which a 3D analysis is used. The result for each region is the multimode multiport generalized admittance matrix (GAM) on a wide band of frequencies from which the generalized scattering matrix (GSM) is computed. Then, the global response of the circuit can be immediately obtained by connecting the partial GSMs.","PeriodicalId":324296,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (C","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127173307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Microwave radiometer are passive low-resolution remote sensing sensors which measure the brightness temperature of the scene under survey. In order to enhance the spatial low-resolution limit a singular value decomposition (SVD) technique is here envisaged for scanning radiometers. Although this paper is theoretical in nature, it is of applicative relevance since it permits one to figure out some interesting multisensor data fusion techniques.
{"title":"A SVD-based reconstruction scheme for microwave radiometers measurements","authors":"G. Mazzarella, M. Migliaccio","doi":"10.1109/APS.2000.874870","DOIUrl":"https://doi.org/10.1109/APS.2000.874870","url":null,"abstract":"Microwave radiometer are passive low-resolution remote sensing sensors which measure the brightness temperature of the scene under survey. In order to enhance the spatial low-resolution limit a singular value decomposition (SVD) technique is here envisaged for scanning radiometers. Although this paper is theoretical in nature, it is of applicative relevance since it permits one to figure out some interesting multisensor data fusion techniques.","PeriodicalId":324296,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (C","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127233656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The need for sensor and method fusion arises in many practical applications, one of those is extended object imaging in passive remote sensing/imaging (RSI) systems that employ different platforms of sensors. In this paper we propose a new approach to solving simultaneous image restoration problems incorporating fusion of all RSI systems by integrating these problems into one augmented inverse problem by imposing the minimum entropy (ME) image model as prior knowledge for restoration (Falkovich et al. 1989). We investigate the fine structure of a Hopfield neural network and propose a sensor fusion method that can be implemented via modification of such a network into the maximum entropy neural network (MENN) using minimum entropy regularization. It is shown that applying the proposed method, the sensor and/or method fusion tasks can be solved without principal complication of the resultant structure of the MENN independent of the number of sensor platforms or methods to be fused. The overall MENN algorithm is presented. The results are illustrated by simulation samples and compared with other high resolution image restoration techniques.
在许多实际应用中出现了对传感器和方法融合的需求，其中之一是采用不同传感器平台的被动遥感/成像(RSI)系统中的扩展目标成像。在本文中，我们提出了一种解决同时图像恢复问题的新方法，通过将最小熵(ME)图像模型作为恢复的先验知识，将这些问题集成到一个增强逆问题中，从而融合所有RSI系统(Falkovich et al. 1989)。我们研究了Hopfield神经网络的精细结构，并提出了一种传感器融合方法，该方法可以通过将这种网络修改为使用最小熵正则化的最大熵神经网络(MENN)来实现。结果表明，应用该方法可以解决传感器和/或方法的融合任务，而无需考虑所融合的传感器平台或方法的数量，也不会导致MENN结构的主要复杂性。给出了MENN的总体算法。仿真结果与其他高分辨率图像恢复技术进行了比较。
{"title":"Sensor and method fusion in remote sensing imagery with neural networks","authors":"Y. Shkvarko, S. Medvedev, R. Jaime, J. Ruiz","doi":"10.1109/APS.2000.874875","DOIUrl":"https://doi.org/10.1109/APS.2000.874875","url":null,"abstract":"The need for sensor and method fusion arises in many practical applications, one of those is extended object imaging in passive remote sensing/imaging (RSI) systems that employ different platforms of sensors. In this paper we propose a new approach to solving simultaneous image restoration problems incorporating fusion of all RSI systems by integrating these problems into one augmented inverse problem by imposing the minimum entropy (ME) image model as prior knowledge for restoration (Falkovich et al. 1989). We investigate the fine structure of a Hopfield neural network and propose a sensor fusion method that can be implemented via modification of such a network into the maximum entropy neural network (MENN) using minimum entropy regularization. It is shown that applying the proposed method, the sensor and/or method fusion tasks can be solved without principal complication of the resultant structure of the MENN independent of the number of sensor platforms or methods to be fused. The overall MENN algorithm is presented. The results are illustrated by simulation samples and compared with other high resolution image restoration techniques.","PeriodicalId":324296,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (C","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124877529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Conical spiral antennas were first developed by Dyson (1959, 1965) using empirical results. No analytical/numerical analysis has been performed to date for the full model with expanding arm width. The only numerical analysis has been by the method of moments (MoM) for the thin-wire conical spiral antenna which is not truly frequency independent. The objective of this paper is to analyze this antenna using the finite-difference time-domain (FDTD) method. A parametric study is used to improve upon the available design base. Various design parameters of the conical spiral antenna are provided as a function of the antenna geometry to supplement Dyson's experimental results.
{"title":"Analysis and design of conical spiral antennas using the FDTD method","authors":"T. Hertel, G.S. Smith","doi":"10.1109/APS.2000.874512","DOIUrl":"https://doi.org/10.1109/APS.2000.874512","url":null,"abstract":"Conical spiral antennas were first developed by Dyson (1959, 1965) using empirical results. No analytical/numerical analysis has been performed to date for the full model with expanding arm width. The only numerical analysis has been by the method of moments (MoM) for the thin-wire conical spiral antenna which is not truly frequency independent. The objective of this paper is to analyze this antenna using the finite-difference time-domain (FDTD) method. A parametric study is used to improve upon the available design base. Various design parameters of the conical spiral antenna are provided as a function of the antenna geometry to supplement Dyson's experimental results.","PeriodicalId":324296,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (C","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115183243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (C
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